JPS6131544B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a record record device such as a video record, and particularly to a record record device such as a video record, and in particular, a video record still wrapped in a protective cover can be inserted into a playback device and removed from the playback device. It relates to a device that can be taken out.

A video disk device is shown in U.S. Pat. No. 3,842,194 to JKClemens. In the system shown therein, the information track consists of geometric changes (changes in shape, size) at the bottom of smooth spiral grooves formed on the surface of the record. Video records have a coating of dielectric material applied over a coating of conductive material. During the playback operation, the capacitance formed between the electrode provided on the playback needle in the groove and the conductive coating of the video record changes as the record is rotated by the turntable. detected,
The recorded information is played back.

In the device of the Clemens patent, in order to obtain sufficient playback time, the surface of the video record is formed with successive groove turns at relatively narrow intervals (e.g., approximately 220 groove turns per centimeter). In the case of a winding density of 4.5 microns), the signal element at the bottom of the groove is relatively fine (for example, the length of the signal element is 0.3 to 0.8 micron, and the depth is 0.1 to 0.15 micron).

A serious problem arises when dust accumulates on such video records. When video records are exposed to atmospheric dust under conditions of high temperature and high humidity, the above-mentioned problems caused by dust accumulation become even more serious. It would therefore be desirable to have a cover that would allow a video record to be completely protected from dust during its storage and handling.

Video records of the type described above are susceptible to damage (eg, scratches and fingerprints) during manual handling. Accordingly, it would be desirable to provide a protective cover that allows a stored video record to be inserted into and removed from the playback device without requiring the user to directly handle the video record.

The device of the present invention is a playback device for playing back a prerecorded signal from a record disc that is removably housed in a protective cover (for example, the protective cover 38); the protective cover is inserted into this playback device. A casing (e.g., casing 29) formed with an ingress/egress slot (e.g., egress/egress slot 22) having dimensions that allow the device to be removed and taken out; a turntable (e.g. turntable 26) having means for centering the record (e.g. center shaft 27) and a surface for receiving the record during playback;
(e.g., a raised position) and a second position (e.g., a lowered position), and in one of the first and second positions, the entrance/exit slot a guide means (e.g. platform 28) having a positioning surface (e.g. surface 31) aligned with the guide means, the positioning surface of the guide means having a hole (e.g. central aperture 32) through which the turntable can pass. is provided. The apparatus of the present invention further provides that when the protective cover containing a record is inserted into a fully inserted position of the playback device and subsequently the protective cover is pulled out of the playback device, the record is placed in the guide means. means for preventing removal of the vinyl record from the playback device so as to remain within the playback device on the positioning surface, the protective cover being inserted into the playback device in a fully inserted position; removal prevention means (for example, clamp device 33) installed in the playback device so as to be located in the entry path of the record stored in the protection cover during the period;
and; means for moving said guide means between said first position and said second position and transferring a record on a positioning surface of said guide means therefrom to said turntable (e.g. 54)
and; in the first position, the positioning surface of the guide means is unobstructed by the means for centering the record, for the protective cover to the removal prevention means. It is designed to form a passageway.

In particular, the structure of the record playback device of the present invention can be significantly simplified by providing the above-mentioned guide means.

The present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 20 denotes a video record player, which has a lid 21 shown in an open position. The lid 21 has an opening 22 which forms an access slot when it is in the open position. The dimensions of the entry/exit slot are
It is provided that a record protective cover can be inserted into and removed from the playback device. As can be seen in FIG. 1, the playback device has a control panel 23 consisting of a playback time indicator 24 and a set of push buttons 25. As can be seen in FIG.

A turntable 26 is shown in FIG. 2 for supporting and rotating the video record during playback operations. Turntable 26 has a center shaft 27 that fits into the center hole of a video record placed thereon.

As shown in FIG. 14, the stand 28 is pivotally fixed to the casing 29 of the playback device by a hinge 30, and its raised position (FIGS. 2, 7 to 9, 11, and 12) and a lowered position (FIG. 10). The stand 28 is the surface 31
, which can maintain the proper position of the video record when it is in the raised position.

The playback device includes a stylus arm pedestal (not shown) that is moved over a video record placed on a turntable 26 during a playback operation. The pedestal 28 is provided with a cutout (not shown) so that the needle arm pedestal can be moved without hindrance over a video record supported by a turntable. The platform 28 is formed with a central aperture 32 through which the turntable 26 can pass when it is in the lowered position. A push button (not shown) for opening the lid 21 is provided on the reproduction device 20. The clamping device 33 has a member 34;
The member 34 has a slot 35 having dimensions that are compatible with the spherical section of the peripheral edge of the video record (hereinafter simply referred to as the peripheral bead portion).
have. The clamping device 33 further includes a pivoted pivot arm 36 which operates to retract the slotted member 34 between a pair of strippers 37 when the playback lid 21 is closed.
Equipped with:

3-6 illustrate a record protective cover 38 suitable for use with the video/record player shown in FIGS. 1 and 2. FIG. cover 38
consists of a pair of parallel panels 39 and 40 forming a space 41 for storing a video record 42, so that the video record can be inserted into and removed from said cover 38. It has an opening 43 that communicates with the space. The panels 39 and 40 are also provided with a clamping device 3 when the cover is fully inserted into the playback device.
A member 34 having three slots formed therein and cutouts 44 and 45 into which a stripper 37 can be inserted are formed.

A pair of wiping pads 46, 47 are fixed to the inner surface of the cover 38 near the opening 43;
Clean the video record when inserting or pulling it out of the cover. The cover 38 also has a pair of stops 48 and 49 that engage with the peripheral bead portion 50 of the video record 42 housed therein to prevent the record from being accidentally removed from the cover. It is provided.

The wiping pads 46 and 47 can be made of, for example, velvet, non-woven polyester (manufactured by DuPont), Scott Paper Corporation's home division (Scott
Made of any reasonably soft and lint-free material, such as polyurethane foam manufactured by Paper Corporation From Division. This type of package is described in detail in co-filed US patent application Ser. No. 747,730, entitled Video Disc Package, inventor MALeadom.

Figures 7 to 12 illustrate inserting the video record housed in the protective cover into the playback device,
It also shows a series of operations for extracting from it.

FIG. 7 shows the protective cover 38 partially inserted into the playback device. When the lid 21 of the playback device is opened, the portion 51 of the platform 28 adjacent the access slot 22 aligns with the slot 22, as shown in FIG. Also, part 5 of the stand 28
1 opens downward to facilitate insertion of the protective cover into the playback device. While inserting the protective cover 38 into the playback device as shown in FIG.
1 brings the cover 38 to the fully inserted position, and the slotted portion 34 of the clamping device 33 and the stripper 37 are formed by the notches 44 and 45 in the cover 38 as shown in FIG. into the designated slot.

When the cover 38 is fully inserted into the playback device, as shown in FIG.
2's peripheral bead portion 50 is received within slot 35 of member 34. Video record 42
The slot 35 of the member 34 is aligned with the peripheral bead of the video record 42 when it is housed within the protective cover and rests on the locating surface 31 on the stand 28 as shown in FIG. ing.

The slot 35 interfits with a peripheral bead 50 of the video record 42 so that when the cover containing the record has been fully pushed into the playback device and the cover is pulled out, the slot 35 is inserted into the slot. A formed member 34 prevents the video record from being removed from the playback device and allows the video record shown in FIG.
8 and held on the positioning surface 31 of No. 8.

As shown in FIG. 10, when the lid 21 of the playback device is closed, the lid 21 is fixed to the swinging arm 36 and the lid 21 is closed.
1 causes the swinging arm 36 to pivot about the pin 53, retracting the slotted member 34 between the strippers 37. Retraction of slotted member 34 between strippers 37 causes clamping device 33 to release video record 42.

Further, when the lid 21 of the playback device is closed, the block 54 (FIG. 2) fixed to the lid moves to the base 28.
and engages the platform 28 in its raised position (FIG. 2).
7 to 9, 11 and 12) to the lowered position (FIG. 10).

The video record disc 42 held by the slotted member 35 and placed on the positioning surface 31 of the stand 28 moves from the raised position (FIG. 9) of the stand 28 to the lowered position (FIG. 10). ) during the move to
With the release of the video record by the slotted member 34, the turntable 2
6 (Figure 10).

Press the push button (not shown) to close the lid 2 of the playback device.
1, the spring 55 (FIG. 13) pushes the lid 21 up into its open position (FIG. 11). When the lid 21 is opened, a member 57 that engages with the base 28
A spring 56 (FIG. 14) coupled to the lid 21 pushes the platform 28 up from its lowered position (FIG. 10) to its raised position (FIG. 11). When the stand 28 moves from its lowered position to its raised position, the video record 4 placed on the turntable 26
2 (FIG. 10) is raised together with the platform 28 (FIG. 11). When the video record 42 is raised, its peripheral bead portion 5 is raised as shown in FIG.
0 presses the slotted member 34,
Rotate this around the pin 58 and push it away so that it does not get stuck.

As shown in FIG. 15, the platform 28 has a downwardly open portion 51 near the access slot 22;
The peripheral portion of the video record placed on the stand 28 protrudes. When an empty cover is inserted into the playback device, the protruding peripheral parts of the video record are automatically introduced into the cover. cover 38
is fully inserted into the playback device, (1) the video
The record 42 is completely stored inside the cover, (2)
Stops 48, 49 engage the peripheral bead of the video record. The stops 48, 49 only engage the peripheral bead portion of the video record when it is completely accommodated within the protective cover, so that it is possible to prevent the video record from being partially accommodated in the cover. The video record is never removed from the playback device. When the cover 38 is pulled out from the playback device, the video record housed in the cover is also pulled out from the playback device.

In this way, the video record can be inserted into and taken out of the playback device while remaining inside the protective cover.

Next, the structure of the clamp device 33 will be explained in detail with reference to FIG. 16. As shown in the figure, a swinging arm 36 to which a roller 52 is fixed at one end is pivotally supported by a pin 53 attached to a support member 59 of the clamp 33. A pin 60 is fixed to the other end of the swing arm 36, and the pin 60 is attached to the support member 5.
It fits into a slot 61 formed in a member 62 which is reciprocatably mounted on 9.

Slotted member 34 is pivotally mounted on a pin 58 secured to reciprocatable member 62. The protrusion 63 of the reciprocating member 62 fits into a notch 64 provided in the slotted member 34. The protrusion 63 aligns the slotted member 34 with the peripheral bead of the video record housed in the protective cover 38 on the positioning surface 31 on the stand 28 (seventh point).
After the playback operation, the video record placed on the stand 28 is raised (Fig. 11,
(Fig. 2), the slotted part can be pushed out of the way.

The slotted member 34 has a slot 35
It has a recess 65 connecting with the slot 35, thereby giving flexibility to the jaw forming the slot 35 so that a peripheral bead portion of a video record can fit between the slots 35 (FIG. 8). Figure 9).

A compression spring 66 connects the reciprocatable member 62 and the support member 59, which causes the slotted member 34 to extend when the playback lid 21 is opened, as shown in FIG. The swing arm 36 is held in the advanced position and the swing arm 36 is positioned in the raised position.

Although only the principle of this invention has been explained above, those skilled in the art will appreciate that various modifications and modifications (for example, placing the turntable upside down or vertically) are possible in addition to the above-described embodiments. It is obvious that the present invention is not limited to the precise structure and operation shown and described. Therefore, all preferred variations and equivalent devices are intended to be included within the scope of the claimed invention.

[Brief explanation of the drawing]

FIG. 1 is a front view of a video/record playback device in which the present invention is implemented, FIG. 2 is a partially cutaway side view of the video/record playback device shown in FIG. 1, and FIG. Figure 4 shows a record protective cover suitable for use with the video/record playback device shown in Figure 1;
5 is a sectional view taken along line 5-5 of the protective cover in FIG. 3, FIG. 6 is an end view of the protective cover in FIG. 3, and FIGS. 7 to 12 are cross-sectional views of the protective cover in FIG. The video records shown in Figures 1 and 2 can be played back from the video records housed in the protective covers shown in Figures 3 to 6 without the need to directly handle the video records housed in the cover. 13 is a diagram showing a series of operations for inserting into and pulling out from the device; FIG. 13 is a diagram showing means for opening the lid of the video/record player of FIGS. 1 and 2; FIG. FIG. 14 shows means for driving the guide means into the raised position in the video record player of FIGS. 1 and 2, and FIG. 15 shows the means for driving the guide means into the raised position in the video record player of FIGS. A diagram illustrating how to insert a video disc into the empty protective cover shown in FIGS. 3 to 6 inserted into a playback device, and FIG. 1 shows details of the construction of a video phonograph biasing device suitable for use with a phonograph playback device; FIG. 20...Playback device, 22...Enter/exit slot,
26... turntable, 28... stand, 29...
Housing, 31... positioning surface, 33... clamping device, 34... member in which slot 35 is formed,
36... Swinging arm, 37... Stripper, 38
...Protective cover, 42...Record, 52...
Roller, 53...Pin, 54...Block, 56
... Spring, 57 ... Member that engages with stand 28, 58 ... Pin, 59 ... Supporting member, 60 ...
Pin, 61...Slot, 62...Reciprocating member.

Claims (1)

[Scope of Claims] 1. A playback device for playing back a pre-recorded signal from a record disc that is removably housed in a protective cover, wherein the protective cover can be inserted into the playback device, It also includes a casing formed with an entry/exit slot having dimensions that allow it to be taken out, and a means for centering the record disc, which is rotatably installed within the casing, and for receiving the record disc during playback. a turntable having a surface that is movable between a first position and a second position within the housing;
and a second position, the guide means having a positioning surface that is aligned with the entrance/exit slot, and the positioning surface of the guide means has a hole through which the turntable can pass. furthermore, when the protective cover containing a record is inserted into a fully inserted position of the playback device and the protective cover is subsequently pulled out of the playback device, the record is placed in the guide means. means for preventing removal of the vinyl record from the playback device so as to remain within the playback device on the positioning surface, the protective cover being inserted into the playback device in a fully inserted position; a removal prevention means installed in the playback device so as to be located in the entry path of the record stored in the protective cover during the period; and a guide means placed in the first position and the second position. means for transferring the record on the positioning surface of the guiding means from there to the turntable by moving the record between the positioning surfaces of the guiding means, and in the first position, the positioning surface of the guiding means A phonograph reproducing device, wherein the passage for the protective cover to the removal prevention means is unobstructed by the means for centering the phonorecord.